一、shell中数组的几种定义方式：
方法一:
[root@localhost ~]# array=(1 2 3)
[root@localhost ~]# echo ${array[*]}
1 2 3方法二：
[root@localhost ~]# array=([1]=one [2]=two [3]=three)
[root@localhost ~]# echo ${array[*]}
one two three方法三：
[root@localhost ~]# array[0]=a
[root@localhost ~]# array[1]=b
[root@localhost ~]# array[2]=c
[root@localhost ~]# echo ${array[1]}
b方法四：动态定义数组变量，并使用命令的输出结果作为数组的内容
[root@localhost ~]# array=($(ls /home))
[root@localhost ~]# echo ${array[*]}
student二、数组的打印和输出
1）打印数组元素（其中@和*的作用相同，均是打印出所有元素）
[root@localhost ~]# array=(one two three)
[root@localhost ~]# echo ${array[2]}
three
[root@localhost ~]# echo ${array[0]}
one
[root@localhost ~]# echo ${array[@]}
one two three
[root@localhost ~]# echo ${array[*]}
one two three2）打印元素个数
[root@localhost ~]# echo ${#array[*]}
3
[root@localhost ~]# echo ${#array[@]}
33）数组的赋值
#如果下标不存在，则自动添加一个新的元素，如果存在，则覆盖原来的值
[root@localhost ~]# array[3]=four
[root@localhost ~]# echo ${array[*]}
one two three four
[root@localhost ~]# array[1]=hello
[root@localhost ~]# echo ${array[*]}
one hello three four4）数组的删除
[root@localhost ~]# unset array[1]
[root@localhost ~]# echo ${array[*]}
one three four
[root@localhost ~]# unset array
[root@localhost ~]# echo ${array[*]}5）数组内容截取和替换
[root@localhost ~]# array=(0 1 2 3 4)
[root@localhost ~]# echo ${array[@]:1:3}
1 2 3
[root@localhost ~]# array=($(echo {a..z}))
[root@localhost ~]# echo ${array[@]}
a b c d e f g h i j k l m n o p q r s t u v w x y z
[root@localhost ~]# echo ${array[@]:1:3}
b c d
[root@localhost ~]# array=(1 2 3 4 5)
[root@localhost ~]# echo ${array[@]/3/three}
1 2 three 4 56)输出所有元素
#!/bin/bash
array=(9 6 7 5 9 1)
for((i=0;i<=${#array[@]}-1;i++))
do
echo ${array[i]}
done
